CN110122965A - Safety cap - Google Patents
Safety cap Download PDFInfo
- Publication number
- CN110122965A CN110122965A CN201910446137.2A CN201910446137A CN110122965A CN 110122965 A CN110122965 A CN 110122965A CN 201910446137 A CN201910446137 A CN 201910446137A CN 110122965 A CN110122965 A CN 110122965A
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- China
- Prior art keywords
- signal
- voltage
- safety cap
- voltage signal
- capacitive sensing
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Classifications
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/04—Soft caps; Hoods
- A42B1/08—Soft caps; Hoods with protection against blows
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/24—Hats; Caps; Hoods with means for attaching articles thereto, e.g. memorandum tablets or mirrors
- A42B1/242—Means for mounting detecting, signalling or lighting devices
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- Geophysics And Detection Of Objects (AREA)
Abstract
This application involves a kind of safety cap, safety cap includes: safety cap ontology, signal processing module, positive installation capacitive sensing module and reversed installation capacitive sensing module；The induction region of forward direction installation capacitive sensing module for obtaining first voltage signal, and transmits it to signal processing module towards safety cap inner space；The induction region of reversed installation capacitive sensing module corresponds to safety cap external environment, for obtaining second voltage signal, and transmits it to signal processing module；Signal processing module is used to judge according to first voltage signal and second voltage signal the wearing state of safety cap.Since the capacitive sensing module reversely installed only is influenced by current environmental temperature, therefore the wearing state of safety cap is judged by the voltage difference between first voltage signal and second voltage signal, it can be avoided influence of the current environmental temperature to safety cap wearing state, the erroneous judgement of the safety cap wearing state further avoided, reduces security risk.
Description
Technical field
This application involves technical field of safety protection, more particularly to a kind of safety cap.
Background technique
In the work progress of construction site, has the related personnel such as construction worker, management, nonnative personnel and enter building site.One
As all can require safe wearing cap that can just be allowed to enter building-site.But often related personnel's awareness of safety does not reach work by force
Often the taking without reason safety cap behind ground scene.It is commonly abnormally dangerous in fact that building site, which has many construction areas to seem very,
's.It often will appear some unexpected production accidents in this way and bring huge loss to human life's property safety.So
It is very urgent that accurate safety cap wears detection demand for building site.
In current traditional technology, using capacitance sensor is arranged in safety cap, by detecting the value of capacitance sensor,
According to the variation of the value of capacitance sensor, the current wearing state of safety cap is judged.But capacitance sensor hot environment, low temperature ring
Border and normal temperature environment capacitance change greatly, that is, capacitance sensor is easy to be affected by temperature.Current traditional technology by
Influence to variation of ambient temperature is big, be easy to cause the erroneous judgement of safety cap wearing state, increases security risk.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of influence that can be avoided environment temperature and avoid safety
The safety cap of cap wearing state erroneous judgement.
A kind of safety cap, the safety cap include: safety cap ontology and the signal that is arranged on the safety cap ontology
Processing module, positive installation capacitive sensing module and reversed installation capacitive sensing module；The positive installation capacitive sensing mould
The induction region of block corresponds to safety cap inner space, and the induction region of the reversed installation capacitive sensing module corresponds to outside safety cap
Portion's environment；The signal processing module installs capacitive sensing module and the reversed installation capacitive sensing with the forward direction respectively
Module connection；The positive installation capacitive sensing module is passed for obtaining first voltage signal, and by the first voltage signal
Transport to signal processing module；The reversed installation capacitive sensing module is used to obtain second voltage signal, and electric by described second
Pressure signal is transmitted to signal processing module；The signal processing module is for receiving first voltage signal and second voltage letter
Number, and judge according to the first voltage signal and second voltage signal the wearing state of the safety cap.
The positive installation capacitance sensing module and reversed installation capacitive sensing module are all wrapped in one of the embodiments,
It includes: signal receiving unit, signal transmitter unit and induction of signal unit；The signal receiving unit, signal transmitter unit with
And induction of signal unit is successively arranged, the signal transmitter unit and the induction of signal unit respectively with the signal processing
Module connection, the induction of signal unit form capacitor, the letter with the signal receiving unit and signal transmitter unit respectively
Number sensing unit forms induction region backwards to the one side of the signal transmitter unit.
In one of the embodiments, the length and width dimensions of the signal transmitter unit be less than periodic signal wavelength two/
One；The length and width dimensions of the signal receiving unit are more than or equal to the length and width dimensions of the signal transmitter unit；The induction of signal
The length and width dimensions of unit are less than or equal to the length and width dimensions of the signal transmitter unit.
The signal processing module is also used to obtain the first voltage signal and the second electricity in one of the embodiments,
The voltage difference between signal is pressed, if the voltage difference is more than or equal to positive number voltage threshold, it is determined that at the safety cap
In wearing state；If the voltage difference is greater than negative voltage threshold and is less than positive number voltage threshold, it is determined that the peace
Full cap is in non-wearing state；If the voltage difference is less than or equal to negative voltage threshold, it is determined that the safety cap is in
Abnormality.
In one of the embodiments, the signal processing module be also used to the wearing state for determining the safety cap it
Afterwards, first voltage signal and second voltage signal are obtained again, and according to the first voltage signal obtained again and the second electricity
Pressure signal judges whether the wearing state of handover security cap.
The signal processing module is also used to judge first electricity in the first preset time in one of the embodiments,
Whether the first voltage value variable quantity of pressure signal is greater than voltage threshold, if the variable quantity of the first voltage value is greater than voltage door
Limit value, then according between second voltage signal and first voltage signal voltage difference and voltage threshold judge whether to switch
The state of safety cap.
If the signal processing module is also used to the first voltage in the first preset time in one of the embodiments,
It is worth variable quantity and is less than or equal to voltage threshold, then continues to obtain first voltage signal and second voltage signal, and according to acquisition
First voltage signal and second voltage signal judge whether the wearing state of handover security cap.
The signal processing module is also used in the safety cap state be wearing state in one of the embodiments,
When, if the voltage difference is greater than negative voltage threshold and is less than positive number voltage threshold, the state of handover security cap is extremely
Non- wearing state；And if the voltage difference be less than or equal to negative voltage threshold or be more than or equal to positive number voltage threshold,
Second preset time that is then delayed obtains first voltage signal and second voltage signal again, if the first voltage letter obtained again
Voltage difference number between second voltage signal is greater than negative voltage threshold and is less than positive number voltage threshold, then switches peace
The state of full cap is to non-wearing state.
The signal processing module is also used in the safety cap state be non-wearing state in one of the embodiments,
When, if the voltage difference is more than or equal to positive number voltage threshold, the state of handover security cap to wearing state；And if institute
Voltage difference is stated less than positive number voltage threshold, then second preset time that is delayed obtains first voltage signal and the second electricity again
Signal is pressed, if the voltage difference between the first voltage signal obtained again and second voltage signal is more than or equal to positive number voltage door
Limit value, the then state of handover security cap to wearing state.
The signal processing module is also used to when the determining safety cap state be abnormal shape in one of the embodiments,
When state, first voltage signal and second voltage signal are obtained again, and believe according to the first voltage signal and second voltage
The wearing state of safety cap number is judged, until the safety cap state is not abnormality.
Above-mentioned safety cap is provided with signal processing module, positive installation capacitive sensing module in the outer wall of safety cap ontology
And reversed installation capacitive sensing module.The induction region of forward direction installation capacitive sensing module is used towards safety cap inner space
In acquisition first voltage signal, and the first voltage signal is transmitted to signal processing module；The capacitive sensing reversely installed
The induction region of module is passed towards safety cap external environment for obtaining second voltage signal, and by the second voltage signal
Transport to signal processing module.Signal processing module judges the safety cap according to the first voltage signal and second voltage signal
Wearing state.It is reversed to pacify since the induction region for the capacitive sensing module reversely installed is towards safety cap external environment
The capacitive sensing module of dress is only influenced by current environmental temperature, and the electricity between first voltage signal and second voltage signal is passed through
Pressure difference judges the state of safety cap, can be avoided influence of the current environmental temperature to safety cap wearing state, further avoids
Safety cap wearing state erroneous judgement, reduce security risk.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of safety cap in one embodiment；
Fig. 2 is the functional block diagram of capacitive sensing module in one embodiment；
Fig. 3 is the circuit block diagram of capacitive sensing module in one embodiment；
Fig. 4 is the schematic diagram that capacitive sensing module generates electric field in one embodiment；
Fig. 5 is that external conductor divides schematic diagram to capacitive sensing module in one embodiment；
Fig. 6 is the flow diagram of safety cap condition detection method in one embodiment；
Fig. 7 is the flow diagram of safety cap state switching method in one embodiment.
Appended drawing reference: safety cap ontology 100, signal processing module 200, positive installation capacitive sensing module 300, signal connect
Receive unit 310, signal transmitter unit 320, induction of signal unit 330, reversed installation capacitive sensing module 400.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of safety cap in one embodiment.
As shown in Figure 1, a kind of safety cap, safety cap includes: safety cap ontology 100 and is arranged in safety cap ontology 100
On signal processing module 200, positive installation capacitive sensing module 300 and reversed installation capacitive sensing module 400；Forward direction peace
The induction region of dress capacitive sensing module 300 corresponds to safety cap inner space, the reversed induction zone for installing capacitive sensing module 400
Domain corresponds to safety cap external environment；Signal processing module 200 is installed with forward direction installation capacitive sensing module 300 and reversely respectively
Capacitive sensing module 400 connects；Forward direction installation capacitive sensing module 300 is for obtaining first voltage signal, and by first voltage
Signal is transmitted to signal processing module 200；Reversed installation capacitive sensing module 400 is for obtaining second voltage signal, and by the
Two voltage signals are transmitted to signal processing module 200；Signal processing module 200 is for receiving first voltage signal and the second electricity
Signal is pressed, and judges the wearing state of safety cap according to first voltage signal and second voltage signal.
Specifically, signal processing module 200, positive installation capacitive sensing module 300 and reversed installation capacitive sensing mould
Block 400 may be mounted on the inner wall of safety cap ontology 100, also may be mounted on the outer wall of safety cap ontology 100.And just
It may be mounted to installation capacitive sensing module 300 and reversed installation capacitive sensing module 400 any on safety cap ontology 100
Position, it is only necessary to meet the induction region of positive installation capacitive sensing module 300 towards safety cap inner space, reversely install electricity
Hold the induction region of induction module 400 towards safety cap external environment.Preferably, by signal processing module 200, positive peace
Dress capacitive sensing module 300 and reversed installation capacitive sensing module 400 are mounted on the outer wall of safety cap ontology 100.Wherein,
The all at least settings one of forward direction installation capacitive sensing module 300 and anyway installation capacitive sensing module.Forward direction installation capacitive sensing
The induction region of module 300 is towards safety cap inner space, and when human body head safe wearing cap, forward direction installs capacitive sensing mould
300 capacitance of block changes, to make positive first for installing capacitive sensing module 300 and transmitting to signal processing module 200
The first voltage value of voltage signal changes.The positive installation capacitive sensing module 300 being understood that is according to human body head
Wearing state exports first voltage signal to signal processing module 200.The induction region pair of reversed installation capacitive sensing module 400
Safety cap external environment is answered, for providing the environment temperature benchmark second changed in real time with temperature change for safety cap
Voltage signal.More specifically, the specification and ginseng of positive installation capacitive sensing module 300 and reversed installation capacitive sensing module 400
Number is completely the same, it is possible to understand that positive installation capacitive sensing module 300 and reversed installation capacitive sensing module 400 need using
Same type capacitive influence sensor.Wherein, positive installation capacitive sensing module 300 and reversed installation capacitive sensing module 400
Used capacitance sensor can be existing general capacitance sensor, and the capacitance sensor of designed, designed also can be used.
Signal processing module 200 excludes interference brought by environment temperature in first voltage signal by second voltage signal, finally into
The judgement of row safety cap state.
In one of the embodiments, as shown in Fig. 2, Fig. 3 and Fig. 4, forward direction installation capacitance sensing module and reversed peace
Filling capacitive sensing module 400 all includes: signal receiving unit 310, signal transmitter unit 320 and induction of signal unit 330；Letter
Number receiving unit 310, signal transmitter unit 320 and induction of signal unit 330 are successively arranged, signal transmitter unit 320 and
Induction of signal unit 330 is connect with signal processing module respectively, induction of signal unit 330 respectively with signal receiving unit 310 and
Signal transmitter unit 320 forms capacitor, and induction of signal unit 330 forms induction region backwards to the one side of signal transmitter unit 320.
Specifically, positive installation capacitance sensing module and reversed installation capacitive sensing module 400 use above-mentioned designed, designed
Capacitance sensor, signal receiving unit 310, signal transmitter unit 320 and induction of signal list including successively parallel arrangement
Member 330.Signal transmitter unit 320 is connect with signal processing module, receives periodic signal from signal processing module 200.Signal hair
It penetrates unit 320 and issues a cycle signal, the signal parameters such as the periodic signal frequency issued and amplitude and signal to aerial
The received periodic signal of transmitting unit 320 is identical.Wherein, the value range of the voltage magnitude of periodic signal is 0V-60V safety electricity
3.3V voltage or more should be arranged in pressure, the amplitude of most preferred periodic signal.It can be set on the frequency theory of periodic signal
Arbitrary value, preferably by the set of frequency of periodic signal between 30KHz-200KHz.Signal transmitter unit 320 can be any
The conductor of material, and the length and width dimensions of signal transmitter unit 320 are less than the half of periodic signal wavelength.Because of length and width ruler
The very little half no more than wavelength, cannot form continuous changes of magnetic field, also just not will form magnetic field radiation externally.Signal
An electric field is formed between transmitting unit 320 and signal receiving unit 310.The effect for the signal transmitter unit 320 being understood that
It is one electric field of external formation.The length and width dimensions of signal receiving unit 310 are more than or equal to the length and width ruler of signal transmitter unit 320
It is very little, and the conductor of signal receiving unit 310 or any material.The effect for the signal receiving unit 310 being understood that
It is to provide current loop, and the periodic signal issued with signal transmitter unit 320 forms electric field, mentions for induction of signal unit 330
For signal detection environment.The length and width dimensions of induction of signal unit 330 are less than or equal to the length and width dimensions of signal transmitter unit 320.And
And the conductor of induction of signal unit 330 or any material.Induction of signal unit 330 be in signal transmitter unit 320 with
Signal receiving unit 310 is formed by electric field.The effect of induction of signal unit 330 be respectively with signal receiving unit 310 and
Signal transmitter unit 320 forms capacitor.Forward direction installation capacitance sensing module and reversed installation capacitive sensing module 400 are mounted on
When safety cap ontology 100, forward direction installation capacitance sensing module is formed by direction of an electric field towards human body head, reversely installs capacitor
Sensing module is formed by external environment of the direction of an electric field towards safety cap.Its external environment refers to safety cap exterior space.
In one of the embodiments, as shown in figure 5, being formed between signal transmitter unit 320 and induction of signal unit 330
Capacitor Ca forms capacitor Cb between induction of signal unit 330 and signal receiving unit 310.The wherein appearance of capacitor Ca and capacitor Cb
Value is calculated according to capacitor by formula C=ε S/4 π kd, and wherein ε is a constant, and S is the positive area of capacitor plate, and d is electricity
Hold the distance of pole plate, k is then electrostatic force constant.Capacitor plate is that the induction of signal unit 330 to form capacitor and signal receive list
Member 310 and signal transmitter unit 320 and induction of signal unit 330.ε and k is known parameters, so determining that capacitance is
The positive area S of the capacitor plate and distance d of capacitor plate.Since the length and width dimensions of signal receiving unit 310 are more than or equal to letter
The length and width dimensions of number transmitting unit 320, and it is greater than the length and width dimensions of induction of signal unit 330, it is possible to understand that, form capacitor
Ca is identical with the positive area S of motor plate of capacitor Cb is formed.The capacitance of capacitor Ca and capacitor Cb are by induction of signal unit in this way
The distance between 330 and signal receiving unit 310 and the distance between induction of signal unit 330 and signal transmitter unit 320
It determines.The distance between induction of signal unit 330 and signal transmitter unit 320 are denoted as S1, by induction of signal unit 330 and letter
The distance between number receiving unit 310 S2, therefore the relationship of capacitor's capacity and distance are as follows:
Ca/Cb=S2/S1
Capacitor Ca and capacitor Cb form derided capacitors in electric field Ea, and the voltage signal after partial pressure is transferred to signal processing
Module 200 calculates the formula of the voltage value of voltage signal are as follows:
Vp=Vac*Ca/ (Ca+Cb)
Wherein Vac is the voltage magnitude of periodic signal, and Ca is between signal transmitter unit 320 and induction of signal unit 330
The capacitance of capacitor is formed, Cb forms the capacitance of capacitor between induction of signal unit 330 and signal receiving unit 310.
When safety cap carries out wearing operation, human body head that is, has outer close to the induction region of capacitive sensing module
Portion's conductor is close to the positive induction region for installing capacitive sensing module 300, that is, approach signal sensing unit 330 is backwards to signal
When the one side of transmitting unit 320, external conductor can be equivalent to another signal receiving unit 310, at this time induction of signal unit
Capacitor Ce is formed between 330 and external conductor.Capacitor Ce and capacitor Cb parallel equivalent are capacitor Cb increase, induction of signal unit
The 330 capacitance partial pressure relationships formed in electric field Ea change.Namely induction of signal unit 330 passes through Dp point to letter at this time
Number processing module 200 transmits the voltage signal of positive installation capacitive sensing module 300, and the value of voltage signal is Vp=Vac* at this time
Ca/(Ca+Cb+Ce).At this point, 400 output voltage values Vn=Vac*Ca/ (Ca+Cb) of capacitive sensing module is reversely installed, that is,
Vp is less than Vn at this time, and signal processing module 200 is according to forward direction installation capacitive sensing module 300 and reversed installation capacitive sensing module
The voltage value of the voltage signal of 400 transmission judges whether there is external conductor close to positive installation capacitive sensing module 300, that is,
Judge the wearing state of safety cap.By Vp=Vac*Ca/ (Ca+Cb+Ce) it can be seen that the capacitance of capacitor Ce is bigger, Jiu Huiyue
It is easy that Vp is made to change.The parameter for influencing capacitor Ce capacitance is the area and signal induction module and outer of signal induction module
The distance between portion's conductor, so the area of induction of signal unit 330 is bigger in electric field Ea, capacitive sensing module is detected
Distance it is remoter.
Forward direction installation capacitive sensing module 300 and reversed installation capacitive sensing module 400 are used into same specification and ginseng
Number capacitance sensor.It can ensure that capacitive sensing is installed in the variation of temperature to forward direction installation capacitive sensing module 300 and reversely
The influence of module 400 is identical, and can preferably exclude temperature influences capacitor bring.When variation of ambient temperature, forward direction is installed
Capacitive sensing module 300 is identical as the reversed installation capacitance variable quantity of capacitive sensing module 400.The peace positive at this time being understood that
It is also identical as the voltage value variable quantity of the voltage signal of reversed installation capacitive sensing module 400 transmission to fill capacitive sensing module 300.
Therefore by the voltage value Vn and positive installation capacitive sensing mould of the voltage signal for transmitting reversed installation capacitive sensing module 400
The voltage value Vp for the voltage signal that block 300 transmits makes the difference, to exclude influence of the temperature to capacitive sensing module.
In one of the embodiments, signal processing module be also used to obtain first voltage signal and second voltage signal it
Between voltage difference, if voltage difference be more than or equal to positive number voltage threshold, it is determined that safety cap is in wearing state；If voltage
Difference is greater than negative voltage threshold and is less than positive number voltage threshold, it is determined that safety cap is in non-wearing state；If voltage
Difference is less than or equal to negative voltage threshold, it is determined that safety cap is in abnormality.
Specifically, signal processing module 200 receive the first voltage signal that positive installation capacitive sensing module 300 is transmitted with
And the second voltage signal that reversed installation capacitive sensing module 400 is transmitted.Wherein, first voltage signal includes the first voltage value；
Second voltage signal includes second voltage value.When signal processing module 200 judges that current safety cap is when in an abnormal state, signal
Processing module 200 obtains first voltage signal and second voltage signal again, and according to first voltage signal and second voltage
Signal judges the wearing state of safety cap, until safety cap state is not abnormality.
Signal processing module is also used in the wearing state that determines safety cap and then secondary in one of the embodiments,
First voltage signal and second voltage signal are obtained, and is sentenced according to the first voltage signal and second voltage signal that obtain again
It is disconnected whether the wearing state of handover security cap.
Specifically, after safety cap initial power-on, signal processing module determines the wearing state of safety cap first, in determination
After complete wearing state, judge whether the first voltage value variable quantity of first voltage signal in the first preset time is greater than voltage door
Limit value, if the variable quantity of the first voltage value is greater than voltage threshold, according to the second voltage signal obtained again and the first electricity
Voltage difference and voltage threshold between pressure signal judge whether the state of handover security cap.If in the first preset time
Whether the first voltage value variable quantity of one voltage signal is less than or equal to voltage threshold, then continue obtain first voltage signal and
Second voltage signal, and judge whether according to the first voltage signal of acquisition and second voltage signal the wearing shape of handover security cap
State.
Signal processing module is according to the electricity between second voltage signal and first voltage signal in one of the embodiments,
Pressure difference and voltage threshold judge whether the state of handover security cap, are in wearing state when starting determining safety cap state
When, if voltage difference is greater than negative voltage threshold and is less than positive number voltage threshold, the state of handover security cap is not to wearing
Wear state；If voltage difference is less than or equal to negative voltage threshold or is more than or equal to positive number voltage threshold, delay second is pre-
If the time obtains first voltage signal and second voltage signal again, if the first voltage signal and second voltage that obtain again
Voltage difference between signal is greater than negative voltage threshold and is less than positive number voltage threshold, then the state of handover security cap is extremely
Non- wearing state.
Signal processing module is according to the electricity between second voltage signal and first voltage signal in one of the embodiments,
Pressure difference and voltage threshold judge whether the state of handover security cap, when start determine safety cap state be in do not wear shape
When state, if voltage difference is more than or equal to positive number voltage threshold, the state of handover security cap to wearing state；And if voltage
Difference is less than positive number voltage threshold, then second preset time that is delayed obtains first voltage signal and second voltage letter again
Number, if the voltage difference between the first voltage signal obtained again and second voltage signal is more than or equal to positive number voltage threshold
It is worth, then the state of handover security cap to wearing state.
In one embodiment, as shown in fig. 6, providing a kind of safety cap condition detection method, peace is preset first
The voltage threshold △ Vth of full cap, wherein △ Vth may be greater than zero arbitrary value, be configured according to actual needs, this reality
Example is applied to be not specifically limited.It is provided with rear safety cap to power on, signal processing module 200 obtains positive installation capacitive sensing module
The second voltage signal Vn that the first voltage signal Vp of 300 transmission and reversed installation capacitive sensing module 400 are transmitted.Sentence first
Whether the voltage difference between disconnected second voltage signal Vn and first voltage signal Vp is less than or equal to negative voltage threshold-△
Vth, if Vn-Vp≤- △ Vth, it is determined that safety cap is in abnormality.When safety cap is when in an abnormal state, obtain again
First voltage signal Vp and second voltage signal Vn is taken, and according to the voltage between second voltage signal and first voltage signal
Difference judges the wearing state of safety cap, until safety cap state is not abnormality.If Vn-Vp >-△ Vth, then sentence
Whether the voltage difference between disconnected second voltage signal Vn and first voltage signal Vp is more than or equal to positive number voltage threshold △
Vth, if Vn-Vp >=+△ Vth, it is determined that safety cap is in wearing state.If-△ Vth < Vn-Vp <+△ Vth, really
Determine safety cap and is in non-wearing state.After signal processing module 200 determines safety cap wearing state, signal processing module
200 obtain the first voltage signal Vp that positive installation capacitive sensing module 300 is transmitted and reversed installation capacitive sensing mould again
The second voltage signal Vn that block 400 transmits detects the variation of Vp when safety cap is in wearing state at this time, judges whether full
Foot-△ Vth < Vn-Vp <+△ Vth, does not wear shape if it is satisfied, then the state of current safety cap is switched to by wearing state
State；If conditions are not met, then the state of current safety cap keeps wearing state.When at this time, safety cap is in non-wearing state, detection
The variation of Vp judges whether to meet Vn-Vp >=+△ Vth, if it is satisfied, then by the state of current safety cap by non-wearing state
Switch to wearing state；If conditions are not met, then the state of current safety cap keeps non-wearing state.Safe hat shape in the present embodiment
State detection method can be avoided influence of the current environmental temperature to safety cap wearing state, and the safety cap further avoided wears shape
The erroneous judgement of state, reduces security risk.
In one embodiment, as shown in fig. 7, providing a kind of safety cap state switching method.Presetting safety
Set the first preset time T 1 and the second preset time T 2 while cap voltage threshold △ Vth together, T1 and T2 can be with
It for the arbitrary value greater than zero, is configured according to the actual situation, the present embodiment is not specifically limited.It wears when determining that safety cap is in
It when wearing state, first determines whether in the first preset time T 1, whether the first voltage value variable quantity of first voltage signal Vp is greater than
Voltage threshold △ Vth, if the first voltage value variable quantity is less than or equal to voltage threshold △ Vth, the shape of current safety cap
State keeps wearing state, continues to obtain first voltage signal Vp and second voltage signal Vn, and according to the first voltage of acquisition
Signal Vp and second voltage signal Vn judges whether the wearing state of handover security cap；If the first voltage value variable quantity is greater than electricity
Pressure gate limit value △ Vth then judges whether satisfaction-△ Vth < Vn-Vp <+△ Vth again, if satisfaction-△ Vth < Vn-Vp <+
The state of current safety cap is then switched to non-wearing state by wearing state by △ Vth, if being unsatisfactory for-△ Vth < Vn-Vp
<+△ Vth, then second preset time T 2 that is delayed obtains first voltage signal Vp and second voltage signal Vn again, and judges
Whether-△ Vth < Vn-Vp <+△ Vth is met, if satisfaction-△ Vth < Vn-Vp <+△ Vth, by current safety cap
State switches to non-wearing state by wearing state；If being unsatisfactory for-△ Vth < Vn-Vp <+△ Vth, current safety cap
State keeps wearing state, continues to obtain first voltage signal Vp and second voltage signal Vn, and according to the first electricity of acquisition
Pressure signal Vp and second voltage signal Vn judges whether the wearing state of handover security cap.Shape is not worn when determining that safety cap is in
It when state, first determines whether in the first preset time T 1, whether the first voltage value variable quantity of first voltage signal Vp is greater than voltage
Threshold value △ Vth, if the first voltage value variable quantity is less than or equal to voltage threshold △ Vth, the state of current safety cap is protected
Wearing state is held, continues to obtain first voltage signal Vp and second voltage signal Vn, and according to the first voltage signal of acquisition
Vp and second voltage signal Vn judges whether the wearing state of handover security cap；If the first voltage value variable quantity is greater than voltage door
Limit value △ Vth then judges whether to meet Vn-Vp >=+△ Vth again, if meeting Vn-Vp >=+△ Vth, by current safety cap
State wearing state is switched to by non-wearing state, if being unsatisfactory for Vn-Vp >=+△ Vth, be delayed the second preset time T 2
First voltage signal Vp and second voltage signal Vn is obtained again, and judges whether to meet Vn-Vp >=+△ Vth, if met
The state of current safety cap is then switched to wearing state by non-wearing state by Vn-Vp >=+△ Vth；If being unsatisfactory for Vn-Vp
>=+△ Vth, then the state of current safety cap keeps wearing state, continues to obtain first voltage signal Vp and second voltage letter
Number Vn, and judge whether according to the first voltage signal Vp of acquisition and second voltage signal Vn the wearing state of handover security cap.
Switching of the safety cap between wearing state and non-wearing state is completed according to above-mentioned safety cap state switching method.The above method
By the way that the second preset time T 2 is arranged, delay judgement is increased, is able to suppress in external environment dry due to caused by accidentally touching
It disturbs, the further accuracy for improving detection.
1 safety cap wearing state truth table of table
| Vn-Vp≥△Vth | - △ Vth < Vn-Vp < △ Vth | Vn-Vp≤-△Vth | |
| Vp+ △ Vth, Vn is constant | It does not wear | It does not wear | It is abnormal |
| Vp- △ Vth, Vn is constant | It wears | It does not wear | It does not wear |
| Vn+ △ Vth, Vp is constant | It wears | It does not wear | It does not wear |
| Vn- △ Vth, Vp is constant | It wears | It does not wear | It is abnormal |
| Vp+ △ Vth, Vn+ △ Vth | It wears | It does not wear | It is abnormal |
| Vp- △ Vth, Vn- △ Vth | It wears | It does not wear | It is abnormal |
| Vp+ △ Vth, Vn- △ Vth | It does not wear | It is abnormal | It is abnormal |
| Vp- △ Vth, Vn+ △ Vth | It wears | It wears | It wears |
Above-mentioned safety cap wearing state truth table, gauge outfit laterally indicate the current wearing state of safety cap, gauge outfit vertical table
Show the voltage value variable quantity of first voltage signal and second voltage signal.
Specification of the above-mentioned safety cap due to positive installation capacitive sensing module 300 and reversed installation capacitive sensing module 400
It is completely the same with parameter, therefore positive installation capacitive sensing module 300 and reversed capacitive sensing module 400 of installing are by the shadow of temperature
Sound be it is identical, further, the voltage value variable quantity that first voltage signal and second voltage signal are affected by temperature is also phase
With.In the use process of safety cap, change of the change of environment temperature to first voltage signal and the generation of second voltage signal
Change identical, but the voltage difference between second voltage signal and first voltage signal will not change.Only in safe wearing cap, de-
Lower safety cap and the reversed installation capacitive sensing module 400 of hand touching can just make first voltage signal or second voltage signal independent
It changes.But it is an of short duration process that hand, which accidentally touches reversed installation capacitive sensing module 400, by the way that the second preset time is arranged
T2, and judge again after being delayed the second preset time T 2 voltage difference between second voltage signal and first voltage signal with
Relationship between voltage threshold can be excluded due to accidentally touching brought erroneous judgement.In safe wearing cap or take off safety
When cap, inherently cause the variation of first voltage signal, the variation of first voltage signal at this time causes second voltage signal and
The variation of voltage difference between one voltage signal, and voltage difference meets the condition of corresponding safety cap wearing state, then cuts
The wearing state of current safety cap is changed to the wearing state for the condition that meets.
Above-mentioned safety cap is provided with signal processing module, positive installation capacitive sensing module in the outer wall of safety cap ontology
And reversed installation capacitive sensing module.The induction region of forward direction installation capacitive sensing module is used towards safety cap inner space
In acquisition first voltage signal, and first voltage signal is transmitted to signal processing module；The capacitive sensing module reversely installed
Induction region towards safety cap external environment, be transmitted to signal for obtaining second voltage signal, and by second voltage signal
Processing module.Signal processing module judges the wearing state of safety cap according to first voltage signal and second voltage signal.Due to
The induction region for the capacitive sensing module reversely installed is towards safety cap external environment, therefore the capacitive sensing module reversely installed
It is only influenced by current environmental temperature, safety cap is judged by the voltage difference between first voltage signal and second voltage signal
State, can be avoided the influence of current environmental temperature, the erroneous judgement of the safety cap wearing state further avoided reduces safety
Hidden danger.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of safety cap, which is characterized in that the safety cap includes: safety cap ontology, is arranged on the safety cap ontology
Signal processing module, positive installation capacitive sensing module and reversed installation capacitive sensing module；
The induction region of the positive installation capacitive sensing module corresponds to safety cap inner space, the reversed installation capacitive sensing
The induction region of module corresponds to safety cap external environment；The signal processing module installs capacitive sensing mould with the forward direction respectively
Block and the reversed installation capacitive sensing module connection；
The first voltage signal is transmitted to letter for obtaining first voltage signal by the positive installation capacitive sensing module
Number processing module；
The second voltage signal is transmitted to letter for obtaining second voltage signal by the reversed installation capacitive sensing module
Number processing module；
The signal processing module is believed for receiving first voltage signal and second voltage signal, and according to the first voltage
Number and second voltage signal judge the wearing state of the safety cap.
2. safety cap according to claim 1, which is characterized in that the positive installation capacitance sensing module and reversed installation
Capacitive sensing module all includes: signal receiving unit, signal transmitter unit and induction of signal unit；
The signal receiving unit, signal transmitter unit and induction of signal unit are successively arranged, the signal transmitter unit with
And the induction of signal unit is connect with the signal processing module respectively, the induction of signal unit connects with the signal respectively
It receives unit and signal transmitter unit forms capacitor, the induction of signal unit forms sense backwards to the one side of the signal transmitter unit
Answer region.
3. safety cap according to claim 2, which is characterized in that
The length and width dimensions of the signal transmitter unit are less than the half of periodic signal wavelength；
The length and width dimensions of the signal receiving unit are more than or equal to the length and width dimensions of the signal transmitter unit；
The length and width dimensions of the induction of signal unit are less than or equal to the length and width dimensions of the signal transmitter unit.
4. safety cap according to claim 1, which is characterized in that
The signal processing module is also used to obtain the voltage difference between the first voltage signal and second voltage signal, if
The voltage difference is more than or equal to positive number voltage threshold, it is determined that the safety cap is in wearing state；If the voltage difference
Value is greater than negative voltage threshold and is less than positive number voltage threshold, it is determined that the safety cap is in non-wearing state；If institute
Voltage difference is stated less than or equal to negative voltage threshold, it is determined that the safety cap is in abnormality.
5. safety cap according to claim 1, which is characterized in that
The signal processing module is also used in the wearing state and then secondary acquisition first voltage signal for determining the safety cap
And second voltage signal, and handover security cap is judged whether according to the first voltage signal and second voltage signal that obtain again
Wearing state.
6. safety cap according to claim 5, which is characterized in that
The signal processing module is also used to judge the first voltage value variation of the first voltage signal in the first preset time
Whether amount is greater than voltage threshold, if the variable quantity of the first voltage value is greater than voltage threshold, is believed according to second voltage
Voltage difference and voltage threshold number between first voltage signal judge whether the state of handover security cap.
7. safety cap according to claim 6, which is characterized in that
If the signal processing module, which is also used to the first voltage value variable quantity in the first preset time, is less than or equal to voltage door
Limit value then continues to obtain first voltage signal and second voltage signal, and according to the first voltage signal of acquisition and the second electricity
Pressure signal judges whether the wearing state of handover security cap.
8. safety cap according to claim 6, which is characterized in that
The signal processing module is also used to when the safety cap state is wearing state, if the voltage difference is greater than negative
Voltage threshold and it is less than positive number voltage threshold, the then state of handover security cap to non-wearing state；And if the voltage
Difference is less than or equal to negative voltage threshold or is more than or equal to positive number voltage threshold, then second preset time that is delayed obtains again
First voltage signal and second voltage signal, if the voltage between the first voltage signal obtained again and second voltage signal
Difference is greater than negative voltage threshold and is less than positive number voltage threshold, then the state of handover security cap to non-wearing state.
9. safety cap according to claim 6, which is characterized in that
The signal processing module be also used to the safety cap state be non-wearing state when, if the voltage difference be greater than etc.
In positive number voltage threshold, then the state of handover security cap to wearing state；And if the voltage difference is less than positive number voltage
Threshold value, then second preset time that is delayed obtain first voltage signal and second voltage signal again, if obtain again
Voltage difference between one voltage signal and second voltage signal is more than or equal to positive number voltage threshold, then the shape of handover security cap
State is to wearing state.
10. safety cap according to claim 6, which is characterized in that
The signal processing module is also used to when determining the safety cap state is abnormality, obtains first voltage letter again
Number and second voltage signal, and judge according to the first voltage signal and second voltage signal the wearing state of safety cap,
Until the safety cap state is not abnormality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910446137.2A CN110122965A (en) | 2019-05-27 | 2019-05-27 | Safety cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910446137.2A CN110122965A (en) | 2019-05-27 | 2019-05-27 | Safety cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110122965A true CN110122965A (en) | 2019-08-16 |
Family
ID=67581845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910446137.2A Pending CN110122965A (en) | 2019-05-27 | 2019-05-27 | Safety cap |
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| Country | Link |
|---|---|
| CN (1) | CN110122965A (en) |
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| CN111798202A (en) * | 2020-06-16 | 2020-10-20 | 中晟宏宇工程咨询有限公司 | Intelligent construction site personnel management method and system, intelligent terminal and storage medium |
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